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Windows 7: No connectivity on ethernet, card was previously working

23 Mar 2014   #1

Win 7 x64
No connectivity on ethernet, card was previously working

Hi friends,

The other day my desktop's ethernet card (Realtek, built into my Asus z87 mobo) apparently stopped working. After multiple reboots etc. it now continually tells me I have "No network access" on "unidentified network" and no matter what I do I cannot access any network resources. Can't even ping the router.

Other computers and devices can get online, both wirelessly and via the hard line so I'm confident in ruling out my router as the culprit - it's definitely a problem with the desktop.

Antivirus detects no malware. Windows reports that the device is working correctly if I examine the network adapter in Control Panel.

It's not a driver issue either: Nothing in the configuration has changed between the system working and not working. I simply shut it down one night after playing some games, and then in the morning it was no longer working.

How can I troubleshoot this?

My System SpecsSystem Spec

23 Mar 2014   #2

Win 7 x64

I have no idea how, but it started working again magically.

It had been not working for 3 or 4 days, powered off, power bar also off.

I downloaded malwarebytes and was running a full scan when the system froze. When I started it back up the network card was not recognized. I thought maybe it was the Realtek "deep sleep" issue, but un-/re-installing drivers did not help.

I took the system apart after my previous post intending to see if I had room to just put in a discrete gigabit NIC in lieu of my broken onboard. Yup, I have a spare x1 PCIe port but I live in a small crappy town so all the PC stores are closed sundays. I put the system back together and booted it back up intending to play some singleplayer games or something, but then the networking started working just fine.

I have no idea, I didn't change anything but it now works
My System SpecsSystem Spec
24 Mar 2014   #3

Windows 7 Ult, Windows 8.1 Pro,

What happens is they get loose or dirty in the PCI slot and lose connection. Often times just powering down and unplugging the system then bleeding power by pushing the start button then remove and reinstall the PCI NIC will fix these types of problems.
My System SpecsSystem Spec


 No connectivity on ethernet, card was previously working

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